Coulomb effects on the optical gain in semiconductor superlattices and multiquantum wells

Autor:	Yup Kim, K.-C. Seo, Koo Chul Je
Rok vydání:	1999
Předmět:	Semiconductor Bloch equations Physics Charge-carrier density Condensed matter physics Screening effect Band gap Coulomb General Physics and Astronomy Semiconductor superlattices Coulomb blockade Electric potential Atomic physics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Zdroj:	Journal of Applied Physics. 86:6196-6199
ISSN:	1089-7550 0021-8979
Popis:	Based on the two-band semiconductor Bloch equations with screened Coulomb interactions, optical gains in a semiconductor superlattice and a multiquantum well are calculated to study the many-body Coulomb effects on the gains. Gain peaks, threshold density of gain and peak-gain frequencies with Coulomb effects are compared to those without Coulomb effects. The Coulomb effects are also studied by varying the carrier density and temperature. The specific Coulomb effects such as Coulomb enhancement, band filling effects, band gap renormalizations and the screening of Coulomb potential on the gain are also considered. It is found that at low temperature the Coulomb enhancement affects the optical gain sensitively, but it has little effect at high temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d1bd2d779455087fd8a2877f6b676ee4 https://doi.org/10.1063/1.371674 Zobrazit plný text záznamu